Fig. 4. Gsh1 mutant embryos do not present any obvious defects in early dorsal interneuron development. (A-D) Expression of postmitotic marker proteins for the six different interneuron populations in the dorsal half of the spinal cord is unchanged in E11.5 Gsh1 mutant embryos. (E,F) Gsh2 and Mash1 also show normal expression patterns, confirming the normal development of dI3-dI5 progenitor populations.